HCC-96RF-C(S) Series
HITROL CO.,LTD.
3
Overview
Characteristics
Operating
Principle
HCC-96RF-C(S) Series is a Radio Frequency Type Level Switch, and it detects level of a
medium by sensing of capacitance value change caused by a dielectric constant of each
medium. HCC-96RF-S Series can solve the build-up phenomenon of the detection part
due to electro-conducting materials by using "Guard Technology Phase Shifting".
For HCC-96RF-C Series, if the level of the medium increases and the main probe comes
into contact with the medium, the impedance changes depending on the capacitance
value. Using phase change of the signal being measured according to change of
impedance, measure the presence or absence of the medium and output it to the relay
contact.
For HCC-96RF-S Series, compares the signal flowing from active sensing probe towards
ground with reference RF signal, when the medium is detecting. Since all material has
unique dielectric constant (relative permittivity) and conductance value that are different
from air, the impedance of the signal circuit is changed when medium touches the
probe. This change causes a shift in phase of the RF Signal. A phase difference between
the active signal and reference signal causes the output circuitry to operate. (This type
can only be applied to solid/dust.)
For cylindrical tank, the capacitance can be obtained as follow.
C : Capacitance of medium (pF)
ε : Relative dielectric constant
L : Length of Probe
D : Outer diameter of tank
d : Outer diameter of sensing probe
C =
■ Compensation electrode type with double structured sensor (Only for HCC-96RF-S)
■ Prevention of malfunction caused by material build-up on the sensor
■ Solid structure and semi-permanent life cycle due to non-machinery parts
■ Easy installation and calibration
■ Operating can be checked at the site.